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Mode of Resistance of Triazine-Resistant Annual Bluegrass (Poa annua)

Published online by Cambridge University Press:  12 June 2017

Steven T. Kelly
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
G. Euel Coats*
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
Dawn S. Luthe
Department of Biochemistry and Molecular Biology, Mississippi State University, Mississippi State, MS 39762
Corresponding author's E-mail:


Two previously identified triazine-resistant annual bluegrass (Poa annua) biotypes in Mississippi were evaluated to determine the level as well as the mode of resistance compared to a triazine-susceptible biotype. Annual bluegrass seeds were collected at two sites (Meridian and Tupelo, MS) from field plots previously treated with 11.2 kg ai/ha simazine. Seeds were planted on agar containing simazine (0, 0.001, 0.01, 0.1, 1, 10, or 100 mM) or diuron (0, 0.01, 0.1, 1, 10, 100, or 1,000 μM), placed in the growth chamber with an 8 h daylength and alternating temperatures of 15 and 20 C, and allowed to grow for 3 wk, after which fresh weight was determined. Data were subjected to regression analyses and the amount of simazine or diuron required to reduce fresh weight to 50% of the untreated plants was determined. These data indicated a greater than 1,000-fold level of resistance to simazine with either biotype. Diuron concentrations of 5.0, 3.0, and 3.2 μM were required to reduce fresh weight to 50% of the untreated for the triazine-susceptible, Meridian, and Tupelo biotypes, respectively. Sequencing a portion of the chloroplast psbA gene revealed a serine 264 to glycine mutation, which reduced the affinity of the triazine herbicides for the QB-binding niche on the D1 protein in photosystem II.

Copyright © 1999 by the Weed Science Society of America 

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Literature Cited

Bettini, P., McNally, S., Sevignac, M., Darmency, H., Gasquez, J., and Dron, M. 1987. Atrazine resistance in Chenopodium album: low and high levels of resistance to the herbicide are related to the same chloroplast psbA gene mutation. Plant Physiol. 84:14421446.Google Scholar
Boyer, S. K. and Mullet, J. E. 1988. Sequence and transcript map of barley chloroplast psbA gene. Nucleic Acid Res. 16:8184.Google Scholar
Eberlein, C. V., Al-Katib, K., Guttieri, M. J., and Fuerst, E. P. 1992. Distribution and characteristics of triazine-resistant Powell amaranth (Amaranthus powellii) in Idaho. Weed Sci. 40:507512.Google Scholar
Goloubinoff, P., Edelman, M., and Hallick, R. B. 1984. Chloroplast-encoded atrazine resistance in Solanum nigrum: psbA loci from susceptible and resistant biotypes are isogenic except for a single codon change. Nucleic Acid Res. 12:94899496.Google Scholar
Gronwald, J. W. 1994. Resistance to photosystem II inhibiting herbicides. In Powles, S. B. and Holtum, J.A.M., eds. Herbicide Resistance in Plants, Biology and Biochemistry. Boca Raton. FL: Lewis Publishers. pp. 2760.Google Scholar
Heap, I. M. 1997. The occurrence of herbicide-resistant weeds worldwide. Pestic. Sci. 51:235243.3.0.CO;2-N>CrossRefGoogle Scholar
Hirschberg, J. and Mclntosh, L. 1983. Molecular basis of atrazine resistance in Amaranthus hybridus . Science 222:13461349.Google Scholar
Hirschberg, J., Bleecker, A., Kyle, D. J., and McIntosh, L. 1984. The molecular basis of triazine herbicide resistance in higher plant chloroplasts. Z. Nat.forsch. 39:412420.Google Scholar
Kelly, S. T. and Coats, G. E. 1998a. Triazine-resistant annual bluegrass in Mississippi turfgrass. Proc. South. Weed. Sci. Soc. 51:71.Google Scholar
Kelly, S. T. and Coats, G. E. 1998b. Potential herbicide resistance in annual bluegrass to simazine. Proc. South. Weed. Sci. Soc. 51:90.Google Scholar
Kelly, S. T. and Coats, G. E. 1999. Triazine-resistant annual bluegrass in Mississippi turfgrass. Weed Sci. Soc. Am. Abstr. 39:89.Google Scholar
Michel, H. and Deisenhofer, J. 1988. Relevance of the photosynthetic reaction center from purple bacteria to the structure of photosystem II. Biochemistry 27:17.Google Scholar
Ryan, G. F. 1970. Resistance of common groundsel to simazine and atrazine. Weed Sci. 18:614616.Google Scholar
Sato, F., Shigematsu, Y., and Yamada, Y. 1988. Selection of an atrazine-resistant tobacco cell line having a mutant psbA gene. Mol. Gen. Genet. 214:358360.Google Scholar
Schonfeld, M., Yaacoby, T., Yehuda, A. B., Rubin, B., and Hirschberg, J. 1986. Triazine resistance in Phalaris paradoxa: physiological and molecular analyses. Z. Nat.forsch. 42c:779782.Google Scholar
Shigematsu, Y., Sato, F., and Yamata, Y. 1989. A binding model for phenylurea herbicides based on the analysis of a Thr264 mutation in the D1 protein of tobacco. Pestic. Biochem. Physiol. 35:3341.Google Scholar
Sinning, I., Michel, H., Mathis, P., and Rutheford, A. W. 1989. Characterization of four herbicide resistant mutants of Rhodopseudomonas viridis by genetic analysis, electron paramagnetic resonance, and optical spectroscopy. Biochemistry 28:55445553.Google Scholar
Smeda, R. J., Hasegawa, P. M., Goldsbrough, P. B., Singh, N. K., and Weller, S. C. 1993. A serine-to-threonine substitution in the triazine herbicidebinding protein in potato cells results in attrazine resistance without impairing productivity. Plant Physiol. 103:911917.Google Scholar
Trebst, A. 1987. The three-dimensional structure of the herbicide binding niche on the reaction center polypeptides of photosystem II. Z. Nat.forsch. 42c:742750.Google Scholar